• Any existing fiberglass hole form can be easily modified for use simply by drilling the form face with a standard hardware store variety 2 1/4” hole saw.
• For starters, we recommend (1) of these magnets for hole form diameters 4”-18”, (3) magnets for 19”-36” and (5) magnets for 38” and greater. Conditions differ from plant to plant so watch closely for any movement in the first few pours. If any movement is noted, drill additional 2 1/4” diameter holes and add magnets accordingly.
• Holding strength of magnets are generally measured on a 1” steel plate. Sufficient holding strength can be achieved with standard industry steel form wall thickness’ of 1/4”. Use caution when using magnetic attachment on modular steel “panel forms”. The thin steel walls (some as little as 1/16”) can significantly reduce the magnets holding strength resulting in slippage during pour.
• Magnets attract any metal. Watch for magnet face contamination that may lead to loss of holding strength.

CANNOT BE USED FOR TAPERED CORE FORMS OR A THIN WALL KNOCKOUT.